Freeman’s donation comes hard on the heels of a fervent appeal by Obama to deep-pocketed Democrats, who thus far have shown much less enthusiasm for the independently run super PACs than have wealthy Republicans and corporate donors, who flooded the GOP committees with cash that can be expended in ways that will aid their candidates.

The actor now joins a small group of entertainment industry figures who have thrown their financial muscle behind the leading Democratic super PAC. Earlier in this election cycle, DreamWorks Animation chief Jeffrey Katzenberg donated $2 million to Priorities USA Action, and -- not long afterward -- HBO talk show host and comedian Bill Maher contributed $1 million.

"He ended combat operations in Iraq, put in place sensible reforms of Wall Street, saved the auto industry and protected the health care of every American," Freeman said. "He has led our nation to be more tolerant and placed impressive, accomplished women on the Supreme Court. In return, he is the target of hundreds of millions of dollars from right-wing sources. I am proud to lend my voice - and support - to those who defend him. Priorities USA Action is doing a great job of protecting the values I believe in. I am happy to help them and I hope others will join me."